Final answer:
To determine how many 30 mg tablets of codeine should be given for a dose of codeine 45 mg, divide the desired dose by the amount of codeine in each tablet.
Step-by-step explanation:
To determine how many 30 mg tablets of codeine should be given for a dose of codeine 45 mg, we need to perform a simple calculation.
We can start by dividing the desired dose of codeine (45 mg) by the amount of codeine in each tablet (30 mg):
45 mg / 30 mg = 1.5 tablets
Therefore, the correct answer is 1.5 tablets.